Central Arizona DX Association


Sept. Meeting

We are the largest ham radio DX club in Arizona with over 120 members, many of whom are on the ARRL's DXCC Honor Roll.  We have several members who have traveled to distant places to put "rare" countries on the air.  We encourage any ham interested in DXing to join our club and learn about the many aspects of talking to hams around the globe who share this amazing hobby with us.  Founded in 1974, we are an ARRL-affiliated club and a member club of the Amateur Radio Council of Arizona (ARCA).

Our next meeting will be on Thursday night, September 7th, at the PERA Club, beginning at 7:00 pm.  The program will be “Voodudes Go South” presented by our own Bud Semon, N7CW.  Bud and the Voodoo Contest Group made their first trip to South America in 2016 for the CQWW CW Contest and operated as PZ5V in Suriname from the guest quarters at the QTH of Ramon, PZ5RA.  Come and hear about their latest contest and DXing adventure.

Please feel free to arrive early to socialize with your friends.  Refreshments will be served at the break.  Guests are always welcome.

The July meeting program was given by Tom Kramer, NQ7R, on “Meteor Scatter” (MS).  This is a very unique mode of ham radio used primarily on 6 and 2 meters that utilizes the "plasma" trails created when meteors and comets burn up while entering the Earth's atmosphere .  Tom discussed the history and science of the mode, including several commercial and military uses over the years.

Tom has been making MS contacts for over 20 years, both here and back in his home state of Iowa.  He has also gone on the road to activate some rare grid squares using MS.  Back in the beginning, MS contacts were made using voice and high speed CW, but all that has changed in recent years with the invention by Joe Taylor, K1JT, of WSJT-X modes like FSK441 and MSK144. 

Tom provided a helpful list of tools for those interested in trying this mode.  It has its greatest potential during the major meteor showers that occur each year at known times, like when the Perseids meteor shower peaks on August 12-13.

From DX Heat


President's Message

August Meeting Recap

The power of the Arizona monsoon season certainly made a strong impression on me and my two car passengers while we tried to make our way to dinner before the August CADXA meeting.  We ended up floating part way to the meeting in a driving, torrential downpour the likes of which I have rarely experienced in my 36 years in Arizona.  Driving east on McDowell Road visibility went to zero several times as cars either pulled off the road or traveled slowly with emergency blinkers flashing.  I finally decided to pull off the road and hit a curb next to a parking lot driveway that put a hole in my front, right tire.  The parking lot was flooding, so we proceeded a little further east and found another parking lot with a higher elevation next to an O'Reilly's Auto Parts store.  That is when I realized I had a very flat tire.  After a can of "Fix-a-Flat" failed to inflate the tire, I asked in the store about my options.  One of the employees who was going off shift offered to help as the rain was subsiding, and put on my spare tire, no simple task.  After many "thank you's" to this good Samaritan, we were able to make our way to a quick dinner and the meeting, arriving only 20 minutes late.  I was amazed by the great meeting turnout despite widespread street flooding.  It is a meeting night that I will not soon forget.

In anticipation of the August meeting program on meteor scatter (MS), I decided to see what I could do with MS at my station.  WSJT-X includes MSK144 in its choices of modes, so I started watching the Ping Jockey website and monitored 50.260, the MS calling frequency.  I had several offers on Ping Jockey of trying to make MS QSOs with me and, with some patience, made my first two contacts on MSK144 with K9YC in CM87 and KF2T in DM25.  How exciting to add another mode to my ham radio career.  I am excitedly looking forward to what will transpire on MSK144 during the upcoming Perseids meteor shower.  After listening to NQ7R's program at the meeting, I have more resources to utilize in pursuing MS QSOs.


Lee, KY7M

Welcome to the Central Arizona DX Association

Announced DX Operations
by NG3K

CADXA Repeater and Net
Join us on the K5VT repeater to announce and discuss DX.  In addition, there is a Thursday night net at 7:00 pm except on CADXA meeting nights.  The repeater and net are open to all DX enthusiasts.   
147.32 MHz (+) no PL tone

Courtesy of The Daily DX™

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